Focus Adjustment; White Balance; Bright Controllable Confirmation - Sony Multiscan CPD-1604S Service Manual

CPD-1604S/1604SA
3-3. FOCUS ADJUSTMENT
1. Turn the signal to 48kHz MODE.
2. Receive a dot signal.
3. Adjust FOCUS VR so that the following figure
point for best focus. (H. V tracking)
70 mm
U:----+------.
50 mm
....--+--<>---0
3-4. WHITE BALANCE
Check that the size. position. distortion. and convergence
have been adjusted. and that aging has been carried
out for more than thirty minutes.
1. Receive the VGA GRAPHICS MODE (f
H
= 31.
5 kHz. 480 LINE).
2. Set the VRs as follows.
BRT RV205 CENT
CaNT RV204 MAX
SUB-CaNT RV502 CENT
SUB-BRT RV511 CENT
R-DRIVE RV504 CENT
B-DRIBE RV503 CENT
R-BIAS RV506 MIN
G-BIAS RV510 MIN
8-BIAS RV505 MIN
ACL RV501 MAX
3. Check that the size is as specified. After checking,
change the VIDEO to a non signal.
Horizontal 300 mm
Vertical 225 mm
4. Use the SCREEN VR (attached to the FOCUS
PACK) to display raster.
Use R.G.B·BIAS VR to adjust any 1 ch VR to
MIN. and adjust so that it becomes almost white
(X
=
0.283. Y
=
0.298 approx.
±
0.05).
5. Use the SCREEN VR to adjust the raster to
3 unit at CaNT MAX and BRT MAX.
6. Receive the VGA 31.5 kHz. 480 LINE. VIDEO
0.714 Vp-p
±
0.002.
7. Receive the white 6% output image rate. adjust
the R. B-DRIVE VR so that the white balance
becomes X
=
0.283, Y
=
0.298 and adjust the
SUB·CONT VR so that the luminance becomes
135 nit.
8. Adjust the CONTRAST VR to MIN. and obtain
the white balance at luminance 5 nit using R.
G, B-BIAS VR.
X
=
0.283. Y
=
0.298
(Decrease it using the BRIGHT VR if luminance
1 0 nit cannot be obtained.)
9. Repeat steps 7 to 8. and obtain the white balances
at 135 nit and 5 nit.
10. Receive the VIDEO non-signal, check that the
raster is CUT -OFF with BRT CENTER. CaNT
MAX .
11. Receive the all white signal (VGA 31.5 Hz.
480 LINE), and adjust ACL VR (RV50l) so
that the luminance becomes 95
±
10 nit at
both BRT MAX and CaNT MAX.
3-5. BRIGHT CONTROLLABLE
CONFIRMATION
1. Input a signal of 480 LINE (fH=31 kHz. entire-
white, 0.714 Vp-p).
2. CONTRAST control ......... maximum
3. Confirm the variation of luminance signal when
controlling BRIGHT volume as follows.
-16-
1 ) Confirm the difference of luminance signal on
maximum position as compared with the center
click position is more than
+
10 NIT.
2) Confirm the difference of luminance signal on
minimum position as' compared with the center
click position is less than -1 0 NIT.
RV506 R-BIAS
RV505 B·BIAS
RV504 R·DRIVE
RV503 B-DRIVE
RV502 S-CONT
RV511 S-BRT
Rv501' ACL
RV510 G-BIAS